Sharpening device for lawn-mowers.



P. D. BARBER & P. B. MoQUEEN.

SHARPENING DEVICE FOR LAWN MOWERS.

APPLICATION FILED DEC. 18, 1909.

Patented Now 29, 1910.

UNITED STATES PATENT, OFFICE.

PERCY n. BARBER, 0F AMHERST, AND FREDERICK B. MCQUEEN, 0 ERoWN-HELM, OHIO.

SHABPENING DEVICE FOR LAWN-MOWERS.

Specification of Letters Patent. i Patented Nov, 29, 1910,

Application filed December '18, 1909. Serial No. 533,938.

To all whom it may concern.

Be it known that we, PERCY D. BARBER and F REDERIOK B. MCQUEEN, citizens of the United States of America, residing at'Amherst and Brownhelm, respectively, in the county of Lorain and State of Ohio, have invented new and useful Improvements in Sharpening Devices for Lawn-Mowers, of which the following is a specification.

This invention relates to sharpening devices for lawn mowers, and it has for its object to provide a sharpening device capable of being easily and quickly attached to a lawn mower of ordinary construction for the purpose of sharpening the knives or cutters while the lawn mower is in operation.

A further object of the invention is to provide an attachment of simple and con-' venient form, whereby the abrading or sharpening member may be conveniently adjusted with relation to theknives or cutters. Further objects of the invention are to simplify and improve the general construction and operation of the class of devices referred to above. a With these and other ends in view which will readily appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangemdnt and combination of parts which will be hereinafter fully described and particularly pointed out in the claims. In. the accompanying drawing has been illustrated a simple and preferred form of the invention, it being, however, understood that no limitation is necessarily made to the precise structural details therein exhibited,

but that changes, alterations and modifica-.

tions within the scope of the invention be resorted to when desired. i,

In the drawing,Figure 1 is a perspective view, showing a lawn mower equ pped with may the improved attachment. Fi 2 1s a side elevation and partial section 0 the sharpening attachment detached.

Corres, onding parts in both figures are denoted y like characters of reference.

In the construction of the improved device two brackets A, A are provided which have a semi-circular seat 5co6perating with a clip 6, whereby thebracket may be firmly clamped and secured upon a portion of the frame, such as the base bar B of an ordinary lawn mower.

Each of the brackets'Ais provided with a, yoke-shaped spring 7, whichlis firmly seare j ,2. A pair of ,clampin cured thereto, one of the leaves 8 of said spring being spaced from the bracket member with which it is connected, and said bracket member being equipped with a set "screw 9, whereby the position of the leaf 8 may be ad justed.

Each of the leaves 8 is provided with a slot 10 for the passage of a bolt 11 carrying a clamping member 12 with which a second clamping member 13 is adjustably connected by means of a bolt 14. The clamping members 12, 13 are provided in their opposed faces with arcuate seats 15 for the reception of a cylindrical sleeve or holder 16 having a slot 17 extending through the entire length thereof, said sleeve or holder being for the reception of a cylindrical abrading bar orsharpener 18, a portion ofrwhioh extends through the slot 17. It is obvious that by tightening the-nut 19 -u onthebolt 14 the abrading bar will be rmly clamped and secured, and it will also be seen that by rotating said abrading bar upon its .axis, which may be done 'by'slightly loosening the nut 19, various portions 'of the surface of said abrading bar maybe successively exposed for use.

The device including thetwo brackets A, A is secured by means of the clamping memhere 6 upon the brace'bar 'B, audit will be readily seen that by adjusting the clamping members 12 upon the spring leaves 8 and by properly adjusting saidv leaves by means of the set screws 9, the abrading bar may be presented in "suitable positlon for engagement with the knives or cutters. 'Wear upon the parts may be;compensated for by roper' adjustment of the set screws 9. The evice, when notr'equired for. present use, may be spring leaves connected therewith, means for adjusting the spring leaves, clamping members carried by said spring leaves, and an abrading member carried by the clamps members havrng spring leaves connected t erewith, set screws bearing against said spring leaves,' 'clamp1ng to an inoperative position by loosene nuts upon the bolts 20 whlch conmet the clips or clamps 6 w1th the bracket members adjustably connected with the ing against the spring leaves, clamping members adjustably connected with the spring leaves, and an abrading member carried by the clamping members.

4:. In a device of the character described, a pair of bracket members, securing means for the same, spring leaves connected with the bracket members, clamping members connected adjustably with the sprin leaves, means for adjusting the tension 0 the latter, a slotted tubular sleeve seated between the clamping members, and a cylindrical abrading member mounted in said slotted sleeve.

In testimony whereof we affix our signa tures in presence of two witnesses.

PERCY D. BARBER. FREDERICK B MCQUEEN.

\Vitnesses AMELIA Y. BARBER, LILLIAN J. BARBER. 

